You can use the stones you get from the Oblivion gates, and you will also learn ...

If you get all the recomendations in the Mages Guild quests and get into the Arc...

If you get all the recomendations in the Mages Guild quests and get into the Arcane University, go to the Chironasium. There will be 2 small shrines where you can enchant your weapons, armor etc. you need a soul gem and a fair bit o money though (depends how strong you want your weapons and/or armor to be)